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    <title>Document</title>
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    <h1>大伟聊前端</h1>
    <!-- //yarn add file:../ testA    -->
    <script>
      window.onload = function () {
        const dom = document.querySelector('h1');
        // debugger;
        // const dog = new testbb.Dog(dom);
        // console.log('BBBB', dog);
      };
    </script>
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